github.com/ttpreport/gvisor-ligolo@v0.0.0-20240123134145-a858404967ba/pkg/marshal/util.go (about)

     1  // Copyright 2020 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package marshal
    16  
    17  // Marshal returns the serialized contents of m in a newly allocated
    18  // byte slice.
    19  func Marshal(m Marshallable) []byte {
    20  	buf := make([]byte, m.SizeBytes())
    21  	m.MarshalUnsafe(buf)
    22  	return buf
    23  }
    24  
    25  // MarshalAll returns the serialized contents of all ms in a newly allocated
    26  // byte slice.
    27  func MarshalAll(ms []Marshallable) []byte {
    28  	buf := make([]byte, TotalSize(ms))
    29  	var written int
    30  	for _, m := range ms {
    31  		m.MarshalUnsafe(buf[written:])
    32  		written += m.SizeBytes()
    33  	}
    34  	return buf
    35  }
    36  
    37  // TotalSize returns the total size of all ms.
    38  func TotalSize(ms []Marshallable) int {
    39  	var size int
    40  	for _, m := range ms {
    41  		size += m.SizeBytes()
    42  	}
    43  	return size
    44  }